The director of Britain’s Serious Fraud Office has secured a two-year extension of his contract to April 2018.

“I am happy to continue as director, and the SFO will continue to take on the sort of cases for which it was designed,” said David Green, who was appointed to the role in 2012 for a fixed term that was due to end in April this year.

The attorney general, Jeremy Wright, who granted the extension, said: “In his time as director of the SFO, David Green led a change in the organisation’s approach to prosecuting cases and delivered the first UK deferred prosecution agreement and the first convictions under the Bribery Act 2010.”

Last month, six defendants in an SFO case regarding alleged rigging of the Libor interest rate benchmark were cleared by a jury, dealing a significant blow to the organisation.